class Constant{//自定义常量类
    public static final int MAX_BULLET_OF_TANK = 5;//敌方最多发射子弹数
    public static final int ENEMY_TANK_NUM = 4;//敌方数量
    public static final int BULLET_SPEED = 4;//子弹速度
    public static final int REFRESH_RATE = 50;//两次绘制之间相隔的ms数，越大节奏越慢

    public static final int TANK_SPEED = 2;

    public static final int ENEMY_ROTATION_FREQUENCY = 20;//数值越大越少转向
    public static final  int WINDOW_HEIGHT = 720;
    public static final  int GAME_HEIGHT = 720;

    public static final int WINDOW_WIDTH = 1200;
    public static final int GAME_WIDTH = 1000;

    public static final int BULLET_SIZE = 3;
}


